<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
</head>
<body>
<form action="lyf_homework1.php" method="post">
<fieldset>
<legend>求一元二次方程的根:ax^2+bx+c=0</legend>
二次项系数: <input type="text" name="a" placeholder="a"><br>
一次项系数: <input type="text" name="b" placeholder="b"><br>
常数项系数: <input type="text" name="c" placeholder="c"><br>
<input type="submit" value="提交">
</fieldset>
</form>

<form action="lyf_homework1.php" method="post">
<fieldset>
<legend>找零</legend>
实收: <input type="text" name="receipts" placeholder="receipts"><br>
应收: <input type="text" name="receivable" placeholder="account receivable"><br>
<input type="submit" value="提交">
</fieldset>
</form>

</body>
</html>